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The Generac 3100 psi (gas - cold water) pressure washer (2015 model) has been discontinued and is not available for purchase at this time.

Generac 3100 PSI (Gas - Cold Water) Pressure Washer (2015 model)

(Based on expert analysis, manufacturer ratings and customer reviews)
4.6 out of 54.6 out of 54.6 out of 54.6 out of 54.6 out of 5
232 Reviews
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  • Features
  • Specs
  • 11
    Q&A 
  • 232
    Reviews
  • Articles
  • Accessories
Grade
Style
Water Pressure
3100
PSI
Water Flow
2.7
GPM
Cleaning Speed
8370
Cleaning Units
Engine
Generac
Powerful Generac 5.5 HP Horizontal Shaft OHV Engine
Easily handles most tasks around the house

High Performance AR Axial Cam Pump
Brass head is more durable than all-aluminum pumps
Easily accessible- no more kneeling to connect hoses

Handy, Manuverable Cart With Spray Gun Holster
Engine & pump are perfectly balanced & easy to move
Large Never-Flat wheels take on varied terrain

Ergonomic Generac Spray Gun With 20" Lance
Soft grip & easy-pull inverted fulcrum trigger reduces fatigue

5 Quick-Click™ Nozzle Tips & 30' M22 Hose
0°, 15°, 25°, 40°, and soap applicator

Two 3/4 Gallon On-Board Detergent Tanks
Keep 2 detergents handy- wash & wax, cleaner & grease cutter, etc

Stabilizing Foot Rest
Holds the unit steady for smoother pull-starting

2 Year Limited Warranty
Protects your investment

Not For Sale In California
Doesn't meet strict CARB emissions standards


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Model
  Model Number:6598
 UPC:696471065985
 Manufacturer:Generac
Engine
 Engine Brand:Generac
 Starter:Recoil
 HP/CC5.5 HP/212 cc
 Fuel Tank Size3.2 quarts
Pump
 Pump Brand:AR
 Pump Type:Axial Cam
 Adjustable Pressure:No
 Chemical Injection:Dual Detergent Tank
 Detergent Tank Capacity:.75 gal x2
Housing
 Frame Type:2-Wheel Cart
 Wheels:NeverFlat
Hose
 Hose Storage:Hook
 Hose Length:30 ft
 Hose Material:PVC/Plastic
 Hose Diameter:1/4 Inch
 Hose Connections:M22
Spray Gun
 Spray Gun Connection:M22
 Spray Gun Grade:Residential
 Spray Gun Wand:Single Wand
 Spray Tips:Quick Connect Tips (5)
 Turbo Nozzle:Sold Separately
Overview
 Weight:67.5 Lbs. (30.62 kilograms)
 Dimensions:23.3L x 16W x 40.3H
(59.18 x 40.64 x 102.36 cm)
 Mfr Consumer Warranty:2 Years

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Read Reviews
How-To Library
  10 Questions
Q: Is there a comparable model that you would recommend over this model?
by Keith Shannon from Maryland on May 26, 2015

A: The unit that is equal in quality, is the Karcher unit model G3050OHC. Karcher makes the pump on the unit and it is one of the best consumer grade units in the industry today. I have attached a link to view that item.

Karcher Unit
by Mike, Product Expert

Q: Is there an extension hose available for this model? What hose would you suggest if I go with a
longer hose instead of the extension hose?

by Steve Lohman from Missouri on April 24, 2015

A: If you need to go with a longer high pressure hose, I would recommend jumping up to a 5/16" diameter hose and using it as a replacement. To extend the length, you would want a stronger more durable hose like the 5/16" hoses. I have attached a link for you to view a 50FT high pressure hose I would recommend for this unit.

50FT High Pressure Hose
by Mike, Product Expert

Q: What is a flywheel brake and what is the purpose of it? does the generac have this brake and the Honda ? I had a Honda washer with a brake on it and I had a lot of different problems with it so im very cautions of buying another
by John T from Florida on September 13, 2014

A: No, this unit does not have a flywheel brake on it. The purpose of that is to control the engine speed. This unit is a great choice for homeowner use. I highly recommend this unit. The pump on the unit is made from AR, and is one of the best axial cam pumps in the industry today.
by Mike, Product Expert

Q: I have a 3100psi Generac model 60242 I purchased from PED. Works great. I have noticed lately that when I tilt the unit back in order to reposition it, it will suddenly quit. Is this the "Oil Alert System" sensing a drop in oil level and shutting down the engine? The unit restarts after a couple of pulls.
by Dave from North Carolina on June 05, 2014

A: It could be the Oil Alert sensor, or an adjustment needed in the carburetor... The good news is this unit comes with a 2 year Factory Warranty from the folks at Generac.

You can use their Service Center Locator to find your local Authorized Repair facilities, or give them a call at (888) 436-3722 x5381.

Please be sure to have the serial number of your pressure washer handy if you call Generac; they usually ask for it. You will need a copy of your invoice for any warranty work- just click on My Account in the upper right corner of our website and follow the prompts to print one out.

If there are several repair locations in your area you may want to call around to see which one has the shortest turn-around time so you get your pressure washer back as quickly as possible.
by Mike, Product Expert

Q: Hi...I see the site sells extended warranties. Who covers these, and what's covered. Also, is it worth it to go beyond the two year Generac offers.
by Brian Warehime from New York on May 29, 2014

A: The Extended warranty is covered by WarrenTech. They will start the day after the manufacture warranty and cover all non wearable items. Things that would not be covered would be items like the hose, gun, wand. They would have you take it to a local service center. I feel the Generac Warranty is great. However, if you would like extra time after that it is available for purchase.
by Mike, Product Expert

Q: I am looking for recommendation on accessories needed for the Generac 6598 to easily clean siding and gutters on a large 2 story house.
Thanks.

by Jared from Florida on May 08, 2014

A: I definitely recommend a telescoping wand and gutter cleaner attachment for your application. If you would like to spray detergent through the telescoping wand you will need to go with an aluminum one. I have included link to the telescoping wand, gutter cleaner, adapter needed to attach to your high pressure hose, and the detergent I recommend.

Telescoping Wand

Gutter Cleaner attachment

Adapter

Detergent
by Mike, Product Expert

Q: Will the Generac 6598 connect to a foam cannon like the MTM Hydro without needing any additional hardware?
by Doug from Rhode Island on April 15, 2014

A: Yes, you can purchase the MTM foamer model 14.0263. This has a fitting on it so that it quick connects into where your colored spray tips usually go, so no additional hardware is needed. I love this foamer!

MTM Foamer
by Mike, Product Expert

Q: What is the pump made out of?
by Zach from Minnesota on April 14, 2014

A: This unit has an AR axial cam pump with a brass head on it. It is a step above the rest in it's category. The brass head dissipates heat more effectively, therefore increasing the life of the pump.
by Mike, Product Expert

Q: Is there a telescoping spray wand available for the
Generac Model 6598?

by Carmen Fontana from Delaware on April 13, 2014

A: Yes, if you would like to be able to dispense detergent I recommend the 24' Aluminum Telescoping Wand. I have also included the adapter you will need to connect this product to your high pressure hose.


24' Aluminum Telescoping Wand

Adapter
by Mike, Product Expert

Q: If you go to Lowes, they still carry the model 6024. You show that model as being disconntinued. The 6598 seems to match up with the 6024, spec for spec. Is there any difference? Why wouldn't Lowes carry the 6598?
by Mark from Connecticut on March 19, 2014

A: The 6024 is the old model number. The new model number is the 6598. It has all the same components as the 6024, just different colors to make it more appealing.
by Mike, Product Expert

Generac 6598 Reviews & Ratings
Overall Rating
Features
5/5
Quality
4/5
Performance
5/5
Value
5/5
Overall
4.6 out of 54.6 out of 54.6 out of 54.6 out of 54.6 out of 5
Pros
Easy To Use (60)
I'd Buy It Again (38)
Price (36)
Easy To Store (23)
Exceeded Expectations (23)
Cons
Low Quality (8)
Bad Instructions (5)
None (5)
Unreliable (4)
Durability (4)
92% of respondents would recommend this product to a friend
232 Reviews  Sort by 
 
Jean D.
Chattanooga, TN
Purchased from Pressure Washers Direct
Purchased 3/9/16
Most Helpful Positive Review
REVIEWED
MAR.
15
2016
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Washer... Easy To Use
This machine is easy to use and does a fantastic job, I am a 70 year old female and wanted something that I could use to clean a concrete patio, driveway, wood decks, and gutters.

This is the first Pressure Washer that I have ever owned , and second time I have ever used one. Took it out of shipping box, read the manual, put the quick connections on, attached the turbo nozzle to wand, connected water hose and pressure hose, put in the gas and oil. It started immediately, only stops when I... more
Jean Recommends This Generac Product
Mike, the Pressure Washer Expert
Product Expert
Jean,
Thank you for your kind words! We try to earn your business every day, and I'm glad we could help you pick the best unit for your needs.
more
Manufacturer Response
Brand Rep
Jean,
We are thrilled to receive your positive feedback! If/when you get the chance, could you please send us an email at ProductReviews@Generac.com? We would relish the opportunity to discuss your experience in further detail-- we've got a couple of follow-up questions for you. We truly appreciate your feedback and look forward to speaking with you in the near future!
more
Was this review helpful?
20
Mark H.
Colorado Springs, CO
Purchased from Pressure Washers Direct
Purchased 7/2/15
Most Helpful Critical Review
REVIEWED
JUL.
23
2015
3 out of 53 out of 53 out of 53 out of 53 out of 5
Not Very Impressed
I received the pressure washer, assembled it, added the proper amount of oil, fueled it up with premium fuel, connected the hose and wand, connected the water supply and fired it up on the second pull. I was initially pleased, but 5 minutes later it died. I've not been able to run it longer than 5 minutes without it suddenly dying.

I called customer service and they gave me four warranty service companies to take it to. I certainly did not expect to have to take it in for warranty work with... more
Mark Does Not Recommend This Product
Manufacturer Response
Brand Rep
Mark,
We are sorry to learn of the issues that you have experienced with your residential grade pressure washer. However, we are glad to know that you have contacted an independent authorized service provider for the diagnostic and servicing work that your unit currently requires. If you would like to follow-up on the status of the services provided to your personal unit, we would recommend contacting your chosen service provider. Moreover, if you would like to discuss these issues with us in further detail, or if you would like to inquire about the warranty status of your personal unit, please do not hesitate to contact us directly at 888-GENERAC (436-3722) with the serial number of your personal unit. We do apologize for any frustration that this unfortunate scenario may have caused.
more
Was this review helpful?
52
Joseph C.
Columbia, SC
Purchased from Pressure Washers Direct
Purchased 3/28/16
REVIEWED
APR.
24
2016
5 out of 55 out of 55 out of 55 out of 55 out of 5
A Great Machine!
I have 2 wooden decks, cement driveway, sidewalk, and 2 porches that are brick. I needed a pressure washer badly. I did my research and came up with Generac as the machine to buy. I love it.

I have used it for about 16 hours now and it is great! Easy to start, easy to use, and WOW the cleaning ability! I even helped a friend clean her canvas awnings with it. It was so easy.

This machine was a major win for me. No one around had one in stock, so I ordered from Pressure Washers... more
Pros: Easy To Use, I'd Buy It Again, Exceeded Expectations, Reliable
Cons: I Can Find No Cons
Joseph Recommends This Generac Product
Was this review helpful?
00
Jim S.
Latrobe, PA
Purchased from Pressure Washers Direct
Purchased 3/21/16
REVIEWED
APR.
18
2016
5 out of 55 out of 55 out of 55 out of 55 out of 5
Awesome!
The Generac 6598 arrived on time and was incredibly simple to set up. It was ready to go in less than 30 minutes, including filling the oil (that took the longest).

So far, I've used to clean concrete steps, rock walls, brick walls, sidewalk and brick patio. Also washed the car - though a sponge and elbow grease is still needed if real dirty.

It starts easily - just remember to have the on switch turned to "ON". Lastly - always remember to read the manual. Everything you... more
Pros: Easy To Use, I'd Buy It Again, Easy To Store, High Quality
Cons: None
Jim Recommends This Generac Product
Was this review helpful?
00
Dean R.
Spokane, WA
Purchased from Pressure Washers Direct
Purchased 2/29/16
REVIEWED
APR.
12
2016
5 out of 55 out of 55 out of 55 out of 55 out of 5
A Former Electric Pressure Washer Owner
The new Generac is powerful enough to handle most any job and is 10x faster when trying to clean moss off brick patios, etc.

This is is the perfect upgrade to my small electric pressure washer which worked 'okay' but required a full weekend to do a simple job.
Dean Recommends This Generac Product
Was this review helpful?
00
Victor C.
Manahawkin, NJ
Purchased from Pressure Washers Direct
Purchased 9/8/15
REVIEWED
OCT.
01
2015
4 out of 54 out of 54 out of 54 out of 54 out of 5
Disappointed
Orange upper plastic handle/spray nozzle severely cracked. Machine performs well, but will be useless when the handle breaks all the way thru.
Victor Recommends This Generac Product
Mike, the Pressure Washer Expert
Product Expert
Victor,
I am so sorry your pressure washer arrived with a cracked handle. I've ordered a replacement handle for you, and you should have it within the next 7-10 days.

As soon as we have tracking information on the handle's shipment we will email it to you through your account.

We appreciate your business and apologize for any inconvenience!
more
Was this review helpful?
71
Edward N.
Bacliff, TX
Purchased from Pressure Washers Direct
Purchased 11/27/15
REVIEWED
DEC.
22
2015
4 out of 54 out of 54 out of 54 out of 54 out of 5
Great Machine / One Small Problem
Trigger handle on the wand sometimes stays stuck on.... twice already it jets off as soon as I start the motor.
I have had to shut off the motor and jiggle the handle. We all know that shouldn't have to be necessary.

...Requested at this time a solution...
Edward Recommends This Generac Product
Mike, the Pressure Washer Expert
Product Expert
Edward,
Your machine is covered by a 2 year Factory Warranty from the folks at Generac. Please give them a call, toll free, at 888-436-3722 so they can send a replacement handle out to you.

Please also have the serial number of your pressure washer handy when you call- they will need it to process your request.
more
Manufacturer Response
Brand Rep
Edward,
As EGD has alluded, we can be contacted at 888-GENERAC (436-3722) for assistance obtaining a new handle. We apologize for your experienced issues and look forward to corresponding with you in the near future.
more
Was this review helpful?
31
Rajen
Baltimore, MD
Purchased from Pressure Washers Direct
Purchased 5/20/15
REVIEWED
AUG.
26
2015
2 out of 52 out of 52 out of 52 out of 52 out of 5
Don't Buy From Generac
We bought this in May 2015 and used it one time for about 2 hours to clean our patio. We then tried to use it again in July and couldn't pull the start cord. I took it to an authorized service shop and found out the engine is shot and after about 3 weeks, Generac said they will not fix it nor refund the money. So we are out $360.00.
Rajen Does Not Recommend This Product
Mike, the Pressure Washer Expert
Product Expert
Rajen,
I apologize for the issues you had. Unfortunately, I reached out to the service center in regards to the issue. The unit was ran with low oil which caused damage to the engine. Unfortunately, this would not be covered under warranty.
more
Was this review helpful?
75
David R.
Chambersburg, PA
Purchased from Pressure Washers Direct
Purchased 5/11/15
REVIEWED
JUN.
02
2015
5 out of 55 out of 55 out of 55 out of 55 out of 5
Great Excellent Machine
Did a lot of research on Pressure-Washers and this is the best model for your home use. Excellent pressure will clean whatever you need cleaned around the house. Would not have any other machine other than this Generac 3100.. Highly recommend this product.

All ready ready changed the 5 hour oil as prescribed and a few hours into the 20 hours before it needs changed again. Two pulls right out of the box and two pulls afterwards, starts right away. Only down fall I see is where you have to... more
David Recommends This Generac Product
Manufacturer Response
Brand Rep
David,
Thank you for providing us with your detailed review of the 3100 psi residential grade pressure washer. We truly value your feedback regarding our manufactured product. Please also be sure to register your unit with Generac Nation if you haven't done so already. Doing so will initiate your product's warranty, and enable you to receive future consumer alerts and warranty-related information. To complete your registration online, please provide the information required via the following link: http://www.generac.com/generac-nation-sign-up?cid=frm-105-aa.
more
Was this review helpful?
31
Michael M.
Durham, NC
Purchased from Pressure Washers Direct
Purchased 1/12/16
REVIEWED
FEB.
04
2016
5 out of 55 out of 55 out of 55 out of 55 out of 5
Zero Issues
I was a little disappointed with the cheap feel of the handle at first impressions. It's just a plastic handle as opposed to a solid piece of steel with plastic piece snapped over it but looking at the available pictures from this site again shows that I should have realized that. Also there is some play once the the 2-piece handle is assembled which, of course, has ZERO affect with the operation of the machine but it was just another thing that doesn't give the user that "this is a solid... more
Pros: Easy To Use, Price, Upright Layout
Cons: Handle Assembly Feels Cheap
Michael Recommends This Generac Product
Mike, the Pressure Washer Expert
Product Expert
Michael,
Using steel in the handle would feel sturdier; but it would also be heavier- and that can really take it's toll if you're working on a large project like cleaning a deck or house.

Using modern materials is easier on your arms, and your budget.
more
Was this review helpful?
10
Michael B.
Billings, MT
Purchased from Pressure Washers Direct
Purchased 10/31/15
Total Reviews
2 Reviews
REVIEWED
NOV.
23
2015
5 out of 55 out of 55 out of 55 out of 55 out of 5
Very Happy
It works very well. Very Happy.
Michael Recommends This Generac Product
Was this review helpful?
10
 


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